41. The definition of the trophic level, TL, for any consumer species is: 42. Each trophic class supports different types of fish and other organisms, as well. 43. In ocean environments, the first two trophic levels are occupied mainly by plankton. 44. NGF has not only a trophic role but also a tropic or guiding role. 45. A trophic function represents the consumption of prey assuming a given number of predators. 46. Furthermore, scientists speculate that debromoaplysiatoxin is accumulated in marine organisms by trophic transfer. 47. The elimination of wolves from Yellowstone National Park had profound impacts on the trophic pyramid. 48. The vital intermediate trophic species however are small pelagic fish that usually feed on phytoplankton. 49. Food webs have trophic levels and positions. 50. Integrated Multi-Trophic Aquaculture ( IMTA ) is an example of a holistic approach.
